Heaven Knows Who by Christianna Brand is a riveting true crime account of the infamous 1862 Sandyford murder case in Glasgow. Blending meticulous research with a novelist’s storytelling flair, Brand reconstructs the brutal killing of Jess M’Pherson and the sensational trial of her friend Jessie M’Lachlan. The book explores the era’s social injustices, flawed legal system, and the groundbreaking use of forensic photography. Suspenseful and thought-provoking, it’s a must-read for fans of historical true crime and those interested in how early forensic science shaped modern investigations.